What kind of filter are you using? Are you running 24/7 (until the algae bloom is cleared) If you are using a sand filter you may need:
1) to back wash
2) to check your sand level
3) to check if your pump is too strong for the filter


Those of us with sand filters will add a little DE powder through the skimmer, anywhere from a 1/4 to 1 cup, as much as it takes to raise pressure 1 lb.

A cheap, but effective tool is called a "Skimmer Sock" (actually that's a brand name, but they are all the same). This goes in your skimmer and greatly enhances the filtering at that point, picking up much that's suspended.